<template>
	<!-- 解决闪烁问题,如价格刚渲染时为undifined -->
	<view v-if="goodsInfo.goods_name" class="goods-detail-container">
		<!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :circular="true" :autoplay="true" :interval="3000" :duration="1000">
			<swiper-item v-for="(item,index) in goodsInfo.pics" :key="index">
				<image :src="item.pics_big" @click="preview(index)"></image>
			</swiper-item>
		</swiper>
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
			<!-- 商品价格 -->
			<view class="goods-price">${{goodsInfo.goods_price}}</view>
			<!-- 商品信息主体 -->
			<view class="goods-info-body">
				<view class="goods-name">
					{{goodsInfo.goods_name}}
				</view>
				<view class="goods-favi">
					<uni-icons type="star" size="18" color="gray"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<!-- 运费 -->
			<view class="goods-free">
				<text>快递:免运费</text>
			</view>
		</view>
		
		<!-- 商品详情区域 -->
		<rich-text :nodes="goodsInfo.goods_introduce"></rich-text>
		
		<!-- 商品导航组件 -->
		<view class="goods-nav">
			<uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
		</view>
	</view>
</template>

<script>
	import {mapState, mapMutations,mapGetters} from 'vuex'
	export default {
		computed : {
			...mapState('cart', []),
			...mapGetters('cart',['total'])
		},
		watch: {
			total: {
				handler(newVal) {
				const findResult = this.options.find(x => x.text === '购物车')
				if(findResult){
					findResult.info = newVal
				}
			},
			// 页面加载时就会被侦听
			immediate:true
		}
		},
		data() {
			return {
				goodsInfo: {} ,// 商品详情对象
				// 左侧按钮组的配置对象
				    options: [{
				      icon: 'shop',
				      text: '店铺'
				    }, {
				      icon: 'cart',
				      text: '购物车',
				      info: 0
				    }],
				    // 右侧按钮组的配置对象
				    buttonGroup: [{
				        text: '加入购物车',
				        backgroundColor: '#ff0000',
				        color: '#fff'
				      },
				      {
				        text: '立即购买',
				        backgroundColor: '#ffa200',
				        color: '#fff'
				      }
				    ]
				
			};
		},
		onLoad(option) {
			this.getGoodsDetail(option.goods_id)
		},
		methods: {
			...mapMutations('cart',['addToCart']),
			async getGoodsDetail (goods_id) {
				const {data:res} = await uni.$http.get('/api/public/v1/goods/detail',{goods_id})
				// 判断是否请求失败,返回弹框
				if(res.meta.status !== 200 ) return uni.$showMsg()
				// 使用字符串的replace()方法,为img标签添加行内的style样式,从而解决图片底部空白间隙的问题
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g , '<img style="display:block;" ')
				// 解决webp格式再ios设备异常显示问题
				res.message.goods_introduce = res.message.goods_introduce.replace(/webp/g , 'jpg')
				// 请求成功
				this.goodsInfo = res.message
			},
			preview(i){
				// 调用uni.previewImage()方法预览图片
				uni.previewImage({
					// 预览时,默认显示图片的索引
					current:i,
					// 所有图片url地址的数组
					urls: this.goodsInfo.pics.map(x => x.pics_big)
				})
			},
			onClick(e) {
				if(e.content.text === '购物车') {
					uni.switchTab({
						url:'/pages/cart/cart'
					})
				}
			},
			buttonClick(e){
				if(e.content.text === '加入购物车') {
					// 组织商品信息对象
					const goods = {
						goods_id:this.goodsInfo.goods_id,
						goods_name:this.goodsInfo.goods_name,
						goods_price:this.goodsInfo.goods_price,
						goods_count:1,
						goods_small_logo:this.goodsInfo.goods_small_logo,
						goods_state:true
					}
					// 调用addToCart方法
					this.addToCart(goods)
				}
			}
		}
	}
</script>

<style lang="scss">
.goods-detail-container{
	padding-bottom: 50px;
}
swiper {
	height: 750rpx;
	
	image {
		width: 100%;
		height: 100%;
	}
}

.goods-info-box {
	padding: 10px;
	padding-right: 0;
	
	.goods-price{
		color: #c00000;
		font-size: 18px;
		margin: 10px 0;
	}
	.goods-info-body{
		display: flex;
		justify-content: space-between;
		
		.goods-name{
			font-size: 13px;
			margin-right: 10px;
		}
		.goods-favi{
			display: flex;
			flex-direction: column;
			width: 120px;
			font-size: 12px;
			align-items: center;
			justify-content: center;
			border-left: 1px solid #efefef;
			color: gray;
		}
	}
	.goods-free{
		font-size: 12px;
		color: gray;
		margin: 10px 0;
	}
}
.goods-nav {
	position: fixed;
	bottom: 0;
	left: 0%;
	width: 100%;
}
</style>